A phosphate buffer (H2PO4¯/HPO42¯) has a pH of 8.3. Which of the following changes will cause the pH to increase?
A) dissolving a small amount of Na2HPO4
B) dissolving a small amount of NaH2PO4
C) adding a small amount of dilute hydrochloric acid
D) adding a small amount of dilute phosphoric acid
E) making the buffer more concentrated by removing some water
Correct Answer:
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